math
posted by peter .
If #(a,b,c,d)means you subtract the sum of the terms from zero, and # (4,8,11,d)=14, then d=
answer and explain

#(a,b,c,d) = 0(a+b+c+d)
0(4+(8)+11+d) = 14
(d+7) = 14
d+7 = 14
d = 21
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